<div style="background: black; width: 400px; height: 50px;"></div>
<div style="background: white; width: 400px; height: 50px;"></div>
<div style="background: black; width: 400px; height: 50px;"></div>
<div style="background: white; width: 400px; height: 50px;"></div>
<div style="background: black; width: 400px; height: 50px;"></div>
<div style="background: white; width: 400px; height: 50px;"></div>
<div style="background: black; width: 400px; height: 50px;"></div>
<div style="background: white; width: 400px; height: 50px;"></div>
